Rim-contracting device.



BIM-ooNTRAcmivG: DEvIcm.

. Wiiniplat llorcester, in the count \Y ot' Worm-:

ft A

i imtlga gnlstate of illassaehnnetts, have inventata.i'iewz'andnsefulRiln-toutriu-ting 'Deieeyof Vwhich! the following in a speelti- .atatian-4 i ai. n "Lrflfhin invention relates to a rim contractr I i., gdevicedesigned to'facilitate the removal .pnelinjnitic tires from the.wo-called dei ,mountable rimas now in common use.

Such rims, as frequently made. consist of i5-single ring of metalsevered at one point m its circumference and Aprovided with :muev formof connecting devices' at vthe ad-A Mjiicent endsof the severed ring.The-se rims are of considerable weight. and sti'ness. particularly ifintended for use with tiresof large diameter. Convenient removal of thetire requires that one end otthe riln he drawn inward ont ofalinement-with the other end ofthe rim and that the rim he thereaftercontracted to smaller diameter, o Jerations conin'ionly requirin a`considera )le expenditme of time and la r.

It, is the general object o-f my invention to provide an improved devicefor quickly and conveniently contractingr a d'emountahle rim and forholding said rim in contracted condition while the tire is removed orreplaced.

Vith this gene-ral. object in view. an im- .portant feature of: myinvention consists in the provision ot' an operating screw in a rimcontracting` ile-vice. movable axially to disaline the. severed endsegeions and movahln angularlv to t'urther contract the rim.

dditional Features ol' my invention.. rcliite to the' provision oflocking means tor holding the ri n in contracted condition and totheprovision of a guide har l'or retaining: the several part` ot' thedevice in operative relatiol'i. Mv invention l'uriher rclatc toarrangements and comllimltions ot paro4 to he hereinafter' described andmore particu lai-l)F pointed out in the appended faimY A preferredl'orlu otl my intention is shown in the draw lgs. in which vFigure l isa lront elevation ot' mv im-y proved riln contracting device. an appliedto a demounl'ahle rim ot' connaon l'nrm;

Fig. 2 isa front. clevatioi.. :carril-ir to Fig. l, hut showing theparteI iu a dill'-rcel po sition;

Specification of Lette-rs Patent.

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""eAMALEONE .Lf-'DE communs, oF woncnsmi.,r uAesAoHUsE'ifrtf l Fig'. Lin a leftdiand end elevation looking inthe direction ofthe arrow ilill-Fig. 1;

Fig. -l is a right-hand end elevation taken in the lircction of thearrow -i iniIig. ,and Fig. I is a partial sectionalw'iciv `tiiikellalone.r the liml 5- in Figui.` liefen-ring to thc drawing; in v improvedrim contractiin;r device comprises' a clumping'inennher lor standitl-to' which an arm 11 is hinged at the point 1:2. The lower'endnl ofthe parte 1t) and l'l are .hapeil to `form clampin,lr jawadaptedrtoengage llie opposite edges oll a riln R. "A l"llonhl'er screw I3 pasaralloosely through an openiiii in the stand 10and is threaded into the arln11,

,Said screw Vhein,,`r eti'eetive to draw the` parts taten-ted Sept. 17', 1218. App'ueauonaied November 26.1917. shia: No. 203.964. l

aiy

ing jaw lo is pivoted at 1T to the member 15H vand a `shoulder screw 18eiluilar'to the screw 13 passes through the /memher 15 and 4is threadediii/the jaw 1t for drawing these parte4 l5 and lti together. said parte`being i-iormally Iucparatcd h v a spring 1H Surrounding: the screw tri.

guide har .tl is pivotally uumected to the member l h v a crew L 4-'aidlair being A lotl`cd al ithl opposite end and living connected to theI"tand ttl h v a laci-ew it passing through the slot ntzlnf liar. Theguide har 'crvw` lo lteepthc two sels of clamping' ilcviccs in operativerelation while permitting relative movement vthereof.` "ff ,\n opcratiup; .-cre\v :2 3 is t nailed in a nul'. t l Fig. .'i) pivotally mountedhctween alims 25 and U Formed ou or Lfeared tothe upper end ot' tlicstand ttl. 'lhe lo'wel. end of the arm "J-t' maiv he extended outwardlyas shown in Fig. sito form a stop for the swinging clamping arm l1.

'l`he lm ver end of the screw 23 extende through a collar Q7 (Fig. 3)pivutltlly mounted in arms 3S formed-on the up I' cud of the clampingmember 1-5. A was er itl is riveted or otherwise 'Secured to the lowerend ot the scm-w 23 to prevent withdrawal thereof from the col ar 27.Swivel connections are thus provided between the uio Figs. 1 and 2.

' a Smaller diameter.

' moved to lool( 'the parts in this contracted screw 23 and the clampingmembers 10 and 15. A latch is pivoted to the stand 10 at 31 for apurpose to be described.

AHaving thus described the construction of my invention the operationthereof will be clearly apparent from a comparison of The two sets ofclam ping devices are first secured to the inside of the rim on oppositesides of the joint, the parts ofeach set` being drawn together by thescrews 13 and 18, for the operation of which a socket wrench 32 isprovided. The screw 23 is then turned-in a direction to draw tho olampinmember 15 toward the stand 10, thus lifting the left-hand section of therim away from the right-hand section with which it is engaged. Afterthis left-hand Section of the rim has been raised sulliciently to clearthe right-hand section, the screw 23 'and socket wrench 32 are utilizedas a level' to swing the parts to the position shown in Fig. Z, thuscontractingr the rini to The, latch 3U is then position while the tireis removed and replaced.

The. latch is then released, permitting the screw 23 to swing to theright, und the screw is then turned to force the member 15 and the rimsection to which it is secured outward to their original position.

Haring thus described my invention, it will be evident that changes undmodifications can be made therein by those skilled il) the ii rt withoutdeparting from the spirit and scope of my invention as set forth in the.claim, and l do not wish to bc otherwise limited to the details hereindisclosed, hut what I claim is.-

A rim contracting device comprising two rim clamps, an operating screwand ii nut, means to attach said Screw to one of said clamps, means toattach Suid nut to the other clamp, said screw being movable axially insaid mit to disengage the parts of said rim and being movableanguliirl)y with said nut to aildilionally contract said rim, and meansto h old said parts with the rim in contracted position.

ln testimony whereof l hereunto affix my signature.

lAN'lAliEUNE A. DE CLLIBUS.

